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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Advanced treatment of secondary effluent by DGB adsorbent for wastewater reuse
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Advanced treatment of secondary effluent by DGB adsorbent for wastewater reuse

机译：DGB吸附剂对二级废水进行深度处理以实现废水回用

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摘要

Laboratory studies on the effect of purifying the secondary effluent from Gao Beidian Wastewater Treatment Plant (WWTP), using DGB (double gel beijing) adsorbent followed by soil aquifer treatment (SAT) for reuse purposes were conducted. A process which consisted of 100 mg/L DGB adsorbent, polyaluminum chloride as a coagulant, sedimentation, sand filtration and soil aquifer treatment for groundwater recharge was selected. This process could greatly decrease UV-254, Color-436 of the secondary effluent, and partially remove DOC and Adsorbable Organic Halogens (AOX). Disinfection by chlorination with the dosage of 6-8 mg/L inactivated significantly total bacteria and total coliform in the DGB adsorbent treated water, however, AOX increased obviously, indicating a high potential of forming disinfection byproducts. The DGB adsorbent treated water had a good water quality and can be used for non-potable purposes. After the tertiary treatment combined with simulated soil columns, the concentrations of nitrogen and many heavy metals were reduced to the levels below the national drinking water standard. The results of the Ames test showed that this secondary effluent had a high level of mutagenicity. And the given tertiary process partially removed mutagenic substances.
机译：对高碑店污水处理厂（WWTP）的二次污水进行净化处理的实验室研究，该污水利用DGB（双凝胶北京）吸附剂然后进行土壤含水层处理（SAT）进行再利用。选择了由100 mg / L DGB吸附剂，聚氯化铝作为凝结剂，沉降，砂滤和土壤含水层处理以补充地下水的工艺。此过程可以大大减少次要废水的UV-254，Color-436，并部分除去DOC和可吸收有机卤素（AOX）。用6-8 mg / L的氯化消毒液可以使DGB吸附剂处理过的水中的总细菌和总大肠菌灭活，但是AOX明显增加，表明形成消毒副产物的可能性很高。经DGB吸附剂处理的水具有良好的水质，可用于非饮用水目的。在进行第三次处理并结合模拟土壤柱后，氮和许多重金属的浓度降低至低于国家饮用水标准的水平。 Ames试验的结果表明，该二级废水具有很高的致突变性。给定的第三级过程部分去除了诱变物质。

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